DP-820 Datasheet, PDF (1/8 Pages) 3M Electronics – Acrylic Adhesives

3
Scotch-Weld^TM
Acrylic Adhesives
DP805 • DP820
Technical Data
December, 2009
Product Description
3M^TM Scotch-Weld^TM Acrylic Adhesives DP805 and DP820 are two-part, 1:1 mix
ratio, toughened acrylic structural adhesives. They exhibit excellent shear and peel
strengths along with good impact and durability and bond well to many metals,
ceramics, wood and most plastics.
Features
• Excellent shear and peel strengths
• 5 minute worklife (Scotch-Weld acrylic adhesive DP805)
20 minute worklife (Scotch-Weld acrylic adhesive DP820)
• Minimal surface preparation
• Easy mixing
• Non-sag
• 1:1 mix ratio
Typical Uncured
Physical Properties
Note: The following technical information and data should be considered representative
or typical only and should not be used for specification purposes.
Product
Scotch-Weld
Scotch-Weld
Acrylic Adhesive Acrylic Adhesive
DP805
DP820
Color
Base (B)
Accelerator (A)
Off-White
Yellow
Off-White
Yellow
Net Weight
(Lbs./Gallon)
Base (B)
8.4
8.6
Accelerator (A)
8.1
8.1
Viscosity¹
@ 73°F (23°C)
Base (B)
Accelerator (A)
75,000 cps
150,000 cps
70,000 cps
45,000 cps
Base Resin
Acrylic
Acrylic
Mix Ratio (B:A)
By Volume
1:1
1:1
By Weight
1:1
1:1
Worklife²
@ 73°F (23°C)
Nozzle mixed
3-4 minutes
15-20 minutes
Applied Open Time³
3 minutes
15 minutes
Time to Handling Strength⁴
7-10 minutes
30-40 minutes
1. Brookfield RVF #7 spindle at 20 rpm.
2. Approximate time during which material can remain in a mixer nozzle and still be expelled without undue force on the applicator.
3. Approximate time after application of adhesive that bonds can be made without adversely affecting wetting out of adhesive and
ultimate performance levels.
4. Time to achieve approx. 50 psi Overlap Shear Strength (OLS) when cured at (73°F) 23°C.